Train your body. Sharpen your technique. But never forget the oldest weapon in the arsenal—the look in your eye.
In a negotiation, if you stare at the contract, you telegraph weakness. If you stare at the other person’s eyes aggressively, you start a fight. But if you practice "The Gaze of the Distant Mountain"—seeing the whole room, the body language, the unspoken tension—you gain control. gankiryu
At its simplest level, Gankiryū is the study of Metsuke (目付け)—the use of the eyes in combat. But that is like saying the ocean is "a little bit of water." Train your body